Rocket Raccoon

"Subject 89P13", better known by his alias "Rocket" is an anthropomorphic, genetically modified raccoon.

89P12's first appearance was in the comic book "Marvel Preview Issue #7 (1976)"

Personality
Fluffy ball of anger

Ranger
Ranger is Rocket's brother.

Rocket's Mother
Not much information is known about the relationship between Rocket and his mother. She seems to be very critical of him, often looking down upon his best efforts.

Rocket's Sister
Not much information is known about the relationship between Rocket and his sister. She seems to be very critical of his actions, comparing him to their other brother, Ranger.

Groot
See Grocket

The relationship between Rocket and Groot

Trivia

 * In the recent series Marvel's Guardians of the Galaxy (2015), it is discovered that Rocket's family had been genetically altered in a way similar to him.
 * In the same episode, it is discovered that Rocket's genetic alterations were unique to him, no other subject in the facility, including his family, had genetic alterations like him, thus making his catch phrase "Ain't nothing like me, 'cept me" all the more meaningful.